公开(公告)号：US5713028A

公开(公告)日：1998-01-27

申请号：US524303

申请日：1995-09-06

申请人： Yutaka Takahashi ,  Toshihiro Ibuka

发明人： Yutaka Takahashi ,  Toshihiro Ibuka

IPC分类号： G06F15/78 ,  G06F1/04 ,  G06F1/32 ,  G06F13/00 ,  G06F13/38

CPC分类号： G06F1/3215

摘要： A UART (Universal Asynchronous Receiver/Transmitter) is used to interface serial data signals, and is provided to associate with a micro-processor in a micro-processor unit. The micro-processor unit is required to save consumption of power, if employed in such devices as a handy terminal device or the like. The micro-processor unit that can save consumption of power includes a microprocessor having a core section, which performs an arithmetic operation, and a universal asynchronous receiver/transmitter section operatively connected to the core section of the micro-processor. The universal asynchronous receiver/transmitter has a first circuit for receiving an asynchronous serial data signal, which is composed of a start bit, a stop bit and data bits provided between the start and stop bits. The first circuit also detects the start bit. Also included in the universal asynchronous receiver/transmitter is a second circuit for setting a flag indicating that the asynchronous serial data signal is being received when the start bit is detected by the first. When the micro-processor detects that the flag is set, stops the supply of clocks to the core section in a sleep mode.

摘要翻译： UART（通用异步收发器）用于连接串行数据信号，并提供与微处理器单元中的微处理器相关联。 如果在诸如便携式终端设备等的设备中使用微处理器单元，则需要节省功率消耗。 可以节省功率消耗的微处理器单元包括具有执行算术运算的核心部分的微处理器和可操作地连接到微处理器的核心部分的通用异步收发器部分。 通用异步接收机/发射机具有用于接收异步串行数据信号的第一电路，其由起始位，停止位和提供在起始位和停止位之间的数据位组成。 第一个电路还检测起始位。 通用异步接收机/发射机中还包括第二电路，用于设置当第一个检测到起始位时指示异步串行数据信号正在接收的标志。 当微处理器检测到标志置位时，在睡眠模式下停止向核心部分提供时钟。

公开(公告)号：US5371800A

公开(公告)日：1994-12-06

申请号：US777184

申请日：1991-10-16

申请人： Noriyoshi Komatsu ,  Masahiro Aota ,  Seiji Komatsuda ,  Toshihiro Ibuka ,  Yoshihiro Matsumoto

发明人： Noriyoshi Komatsu ,  Masahiro Aota ,  Seiji Komatsuda ,  Toshihiro Ibuka ,  Yoshihiro Matsumoto

IPC分类号： H04B1/04 ,  G10L11/02 ,  G10L5/00

CPC分类号： G10L25/78

摘要： A speech detection circuit includes an amplifier for amplifying an input audio signal and having a variable gain, a rectifying circuit for rectifying an output signal of the amplifier, a comparator for comparing an output signal level of the rectifying circuit with a reference level, and a control circuit for outputting a control signal based on an output signal of the comparator. The control circuit outputs a control signal which indicates a power save mode after a predetermined time elapses from a time when the output signal level of the rectifying circuit becomes less than or equal to the reference level, and outputs a control signal which indicates a normal mode immediately when the output signal level of the rectifying circuit becomes greater than the reference level. The amplifier receives the control signal output from the control circuit and reduces its gain when the control signal indicates the power save mode.

摘要翻译： 语音检测电路包括用于放大输入音频信号并具有可变增益的放大器，用于对放大器的输出信号进行整流的整流电路，将整流电路的输出信号电平与参考电平进行比较的比较器，以及 控制电路，用于基于比较器的输出信号输出控制信号。 控制电路从整流电路的输出信号电平变为小于等于参考电平的时刻起经过了规定时间后，输出表示省电模式的控制信号，并输出表示正常模式的控制信号 立即当整流电路的输出信号电平变得大于基准电平时。 当控制信号指示省电模式时，放大器接收从控制电路输出的控制信号并降低其增益。

公开(公告)号：US6058164A

公开(公告)日：2000-05-02

申请号：US550660

申请日：1995-10-31

申请人： Toshihiro Ibuka ,  Masahiro Aota ,  Nozomu Nyui ,  Tadashi Abe

发明人： Toshihiro Ibuka ,  Masahiro Aota ,  Nozomu Nyui ,  Tadashi Abe

IPC分类号： H04M1/00 ,  H04M1/57 ,  H04M1/65 ,  H04M1/663 ,  H04M1/725 ,  H04M19/04 ,  H04M1/64

CPC分类号： H04M19/04 ,  H04M1/6505 ,  H04M1/663 ,  H04M1/57 ,  H04M1/72519 ,  H04M19/042

摘要： The present invention relates to a mode-switchable telephone and mode setting and switching methods for the telephone. The mode-switchable telephone has a comparing unit which compares a value of a ringer adjusting volume with a volume value for setting a second mode, and a control unit which switches a first mode to the second mode when it is determined based on the result of the comparison by the comparing unit that the value of the ringer adjusting volume is set to be equal to or less than the volume value for setting the second mode. This structure facilitates the operation of the telephone having an automatic answering/recording function and a simple pager function.

摘要翻译： 本发明涉及一种用于电话的可切换模式的电话和模式设置和切换方法。 可切换模式的电话具有比较单元，该比较单元将振铃器调节音量的值与用于设置第二模式的音量值进行比较;以及控制单元，当基于所述第一模式的结果确定第一模式时，将第一模式切换到第二模式 所述比较单元将所述振铃器调节音量的值设定为等于或小于用于设定所述第二模式的音量值的比较。 这种结构有助于具有自动应答/记录功能和简单寻呼机功能的电话的操作。